Ok... so just downloading the modules from https://build.prestashop-project.org/ps-monitor-module-releases/ hasn't been an issue until we see that there is an update to ps_accounts which isn't listed on that page.
We're still getting Could not perform action update for module undefined when trying to update from our backoffice, but installing with the zip file seems to work as long as we can download it.
Any idea where we can get the ps_accounts 6.x latest version?